Which mathematical expression is modeled using object-oriented constructs in this code listing?
Which mathematical expression is modeled using object-oriented constructs in this code listing?
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Transcribed Image Text:Which mathematical expression is modeled using object-oriented constructs in this code
listing?
О (6 /2) х 3
O 6/(2 x 3)
О3x (6 /2)
О (2 х 3)/6
![Assume the correct imports were made for Union and self-referencing classes such that this
code listing contains no errors.
For this diagram, you are not expected to have any constructor frames.
5
class Mul:
lhs: Union[Div, Mul, int]
rhs: Union[Div, Mul, int]
7
8.
def eval(self) -> int:
lhs = eval(self.lhs)
rhs = eval(self.rhs)
10
11
12
return lhs * rhs
13
14
class Div:
lhs: Union[Div, Mul, int]
rhs: Union[Div, Mul, int]
15
16
17
18
def eval(self) -> int:
lhs = eval(self.lhs)
rhs = eval(self.rhs)
19
20
21
return lhs // rhs
22
def eval(e: Union[Div, Mul, int]) -> int:
if isinstance(e, int):
23
24
25
return e
26
else:
27
return e.eval()
28
29
e = Div()
30
e.lhs = 6
31
e.rhs = Mul(O
32
e.rhs.lhs = 2
33
e.rhs.rhs
3
34
print(e.eval0)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe3432627-9518-4b79-9e17-5b6a13b525e6%2F7296ad05-1e14-4b9d-9ae5-34062f718b77%2Fqahkrop_processed.png&w=3840&q=75)
Transcribed Image Text:Assume the correct imports were made for Union and self-referencing classes such that this
code listing contains no errors.
For this diagram, you are not expected to have any constructor frames.
5
class Mul:
lhs: Union[Div, Mul, int]
rhs: Union[Div, Mul, int]
7
8.
def eval(self) -> int:
lhs = eval(self.lhs)
rhs = eval(self.rhs)
10
11
12
return lhs * rhs
13
14
class Div:
lhs: Union[Div, Mul, int]
rhs: Union[Div, Mul, int]
15
16
17
18
def eval(self) -> int:
lhs = eval(self.lhs)
rhs = eval(self.rhs)
19
20
21
return lhs // rhs
22
def eval(e: Union[Div, Mul, int]) -> int:
if isinstance(e, int):
23
24
25
return e
26
else:
27
return e.eval()
28
29
e = Div()
30
e.lhs = 6
31
e.rhs = Mul(O
32
e.rhs.lhs = 2
33
e.rhs.rhs
3
34
print(e.eval0)
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